UBUNTU-CVE-2026-15226

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Source

https://ubuntu.com/security/CVE-2026-15226

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-15226

Upstream

CVE-2026-15226

Downstream

USN-8579-1

Related

USN-8579-1

Published

2026-07-21T14:00:00Z

Modified

2026-07-21T23:00:17.599471989Z

Severity

8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
Ubuntu - high

Summary

[none]

Details

A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.

References

Affected packages

Ubuntu:22.04:LTS

snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.76+ubuntu22.04.1

Affected versions

2.*

2.53+21.10ubuntu1

2.54.2+22.04ubuntu1

2.54.2+22.04ubuntu2

2.54.2+22.04ubuntu3

2.54.3+git19.g868fc21+22.04

2.54.3+git26.g360067e+22.04

2.55.2+22.04

2.55.2+22.04.1

2.55.3+22.04

2.55.3+22.04ubuntu1

2.55.5+22.04

2.56.2+22.04ubuntu1

2.57.4+22.04

2.57.5+22.04

2.57.5+22.04ubuntu0.1

2.58+22.04

2.58+22.04.1

2.61.3+22.04

2.62+22.04

2.63+22.04

2.63+22.04ubuntu0.1

2.65.3+22.04

2.66.1+22.04

2.67.1+22.04

2.68.5+ubuntu22.04.1

2.71+ubuntu22.04

2.72+ubuntu22.04

2.73+ubuntu22.04

2.73+ubuntu22.04.1

2.74.1+ubuntu22.04.4

2.75.2+ubuntu22.04

2.76+ubuntu22.04

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "golang-github-ubuntu-core-snappy-dev"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "snap-confine"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "snapd"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "snapd-xdg-open"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "ubuntu-core-launcher"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "ubuntu-core-snapd-units"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "ubuntu-snappy"
        },
        {
            "binary_version": "2.76+ubuntu22.04.1",
            "binary_name": "ubuntu-snappy-cli"
        }
    ],
    "priority_reason": "CVSS high",
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json"

Ubuntu:24.04:LTS

snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.76+ubuntu24.04.1

Affected versions

2.*

2.60.4+23.10

2.61.3+24.04

2.62+24.04build1

2.63+24.04

2.63+24.04ubuntu0.1

2.63.1+24.04

2.65.3+24.04

2.66.1+24.04

2.67.1+24.04

2.68.5+ubuntu24.04.1

2.71+ubuntu24.04

2.72+ubuntu24.04

2.73+ubuntu24.04

2.73+ubuntu24.04.1

2.73+ubuntu24.04.2

2.74.1+ubuntu24.04.4

2.75.2+ubuntu24.04

2.76+ubuntu24.04

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "golang-github-ubuntu-core-snappy-dev"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "snap-confine"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "snapd"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "snapd-xdg-open"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "ubuntu-core-launcher"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "ubuntu-core-snapd-units"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "ubuntu-snappy"
        },
        {
            "binary_version": "2.76+ubuntu24.04.1",
            "binary_name": "ubuntu-snappy-cli"
        }
    ],
    "priority_reason": "CVSS high",
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json"

Ubuntu:26.04:LTS

snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.76+ubuntu26.04.3

Affected versions

2.*

2.71.1+ubuntu25.10.1

2.72+ubuntu26.04.1

2.73+ubuntu26.04.1

2.74+ubuntu26.04

2.74.1+ubuntu26.04

2.74.1+ubuntu26.04.3

2.74.1+ubuntu26.04.4

2.75.2+ubuntu26.04.2

2.76+ubuntu26.04.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.76+ubuntu26.04.3",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.76+ubuntu26.04.3",
            "binary_name": "snapd"
        }
    ],
    "priority_reason": "CVSS high",
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json"

Ubuntu:Pro:16.04:LTS

snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.61.4ubuntu0.16.04.1+esm4

Affected versions

1.*

1.9

1.9.1.1

1.9.2

2.*

2.0

2.0.1

2.0.2

2.0.3

2.0.5

2.0.8

2.0.9

2.0.10

2.11+0.16.04

2.12+0.16.04

2.13

2.14.2~16.04

2.15.2ubuntu1

2.16ubuntu3

2.17.1ubuntu1

2.20.1ubuntu1

2.21

2.22.2

2.22.3

2.22.6

2.23.1

2.24.1

2.25

2.26.10

2.27.5

2.28.5

2.29.4.2

2.32.3.2

2.32.9

2.33.1ubuntu2

2.34.2

2.34.2ubuntu0.1

2.37.4

2.37.4ubuntu0.1

2.38

2.39.2

2.39.2ubuntu0.2

2.40

2.42.1

2.45.1

2.45.1ubuntu0.2

2.46.1

2.47.1

2.48

2.48.3

2.54.3+16.04~esm2

2.54.3+16.04.0ubuntu0.1~esm3

2.54.3+16.04.0ubuntu0.1~esm4

2.54.3+16.04.0ubuntu0.1~esm5

2.54.3+16.04.0ubuntu0.1~esm6

2.61.4ubuntu0.16.04.1+esm1

2.61.4ubuntu0.16.04.1+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "golang-github-ubuntu-core-snappy-dev"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "snap-confine"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "snapd"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "snapd-xdg-open"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "ubuntu-core-launcher"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "ubuntu-core-snapd-units"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "ubuntu-snappy"
        },
        {
            "binary_version": "2.61.4ubuntu0.16.04.1+esm4",
            "binary_name": "ubuntu-snappy-cli"
        }
    ],
    "priority_reason": "CVSS high",
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json"

Ubuntu:Pro:18.04:LTS

snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.61.4ubuntu0.18.04.1+esm4

Affected versions

2.*

2.28.5+17.10

2.29.4.1+18.04

2.29.4.2+18.04

2.31.1+18.04

2.32+18.04~pre5

2.32+18.04~pre6

2.32+18.04

2.32.3.2+18.04

2.32.5+18.04

2.32.8+18.04

2.32.9+18.04

2.33.1+18.04ubuntu2

2.34.2+18.04

2.34.2+18.04.1

2.37.1+18.04

2.37.1.1+18.04

2.37.4+18.04

2.37.4+18.04.1

2.38+18.04

2.39.2+18.04

2.40+18.04

2.42.1+18.04

2.45.1+18.04

2.45.1+18.04.2

2.46.1+18.04

2.47.1+18.04

2.48+18.04

2.48.3+18.04

2.49.2+18.04

2.51.1+18.04

2.54.2+18.04ubuntu1

2.54.3+18.04

2.54.3+18.04.2ubuntu0.1

2.54.3+18.04.2ubuntu0.2

2.55.5+18.04

2.57.5+18.04

2.57.5+18.04ubuntu0.1

2.58+18.04

2.58+18.04.1

2.61.4ubuntu0.18.04.1+esm1

2.61.4ubuntu0.18.04.1+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "golang-github-ubuntu-core-snappy-dev"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "snap-confine"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "snapd"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "snapd-xdg-open"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "ubuntu-core-launcher"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "ubuntu-core-snapd-units"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "ubuntu-snappy"
        },
        {
            "binary_version": "2.61.4ubuntu0.18.04.1+esm4",
            "binary_name": "ubuntu-snappy-cli"
        }
    ],
    "priority_reason": "CVSS high",
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json"

Ubuntu:Pro:20.04:LTS

snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.67.1+20.04ubuntu1~esm3

Affected versions

2.*

2.41+19.10.1

2.42.1+20.04

2.43.3+git1.8109f8

2.44~pre1+20.04

2.44+20.04

2.44.2+20.04

2.44.3+20.04

2.45.1+20.04

2.45.1+20.04.2

2.46.1+20.04

2.47.1+20.04

2.48+20.04

2.48.3+20.04

2.49.2+20.04

2.51.1+20.04ubuntu2

2.54.2+20.04ubuntu2

2.54.3+20.04

2.54.3+20.04.1

2.54.3+20.04.1ubuntu0.1

2.54.3+20.04.1ubuntu0.2

2.54.3+20.04.1ubuntu0.3

2.55.5+20.04

2.57.5+20.04

2.57.5+20.04ubuntu0.1

2.58+20.04

2.58+20.04.1

2.61.3+20.04

2.62+20.04

2.63+20.04

2.63+20.04ubuntu0.1

2.65.3+20.04

2.66.1+20.04

2.67.1+20.04

2.67.1+20.04ubuntu1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "golang-github-snapcore-snapd-dev"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "golang-github-ubuntu-core-snappy-dev"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "snap-confine"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "snapd"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "snapd-xdg-open"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "ubuntu-core-launcher"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "ubuntu-core-snapd-units"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "ubuntu-snappy"
        },
        {
            "binary_version": "2.67.1+20.04ubuntu1~esm3",
            "binary_name": "ubuntu-snappy-cli"
        }
    ],
    "priority_reason": "CVSS high",
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15226.json"